Extracting steam from turbines for industrial purposes.



B. D. DICKINSON.

EXTRAGTING STEAM FROM TURBINES FOR INDUSTRIAL PURPOSES.

APPLICATION TILED AUG.7,1912.

1,0851 14. Patented Jan. 27, 1914.

2 SHEETSSHEET 1.

b gy/M,

E. D. DICKINSON. EXTRAOTING STEAM FROM TURBINES FOR INDUSTRIAL PURPOSES. APPLICATION FILED AUG. 7, 1912.

1 ,085,1 1 4. Patented Jan. 27, 1914' 2 SHEETS-SHEET 2. q

p1 LL E Witnesses: Inventor-.2

His o ttorngg.

UNITED STATES PATENT OFFICE.

D. DICKINSON, OF S HENECTADY, NEW YQRK,

AESIGNOR .TD GENERAL EIL-EC'IRICOQMPANY, A CORPORATION or NEW Yonx 7 ball 'w homiit concern;

' Be it knownfthat l, Eucaa D..DIox1NsoN,

I tady, State; of NewiYork, have invented certain andQuSiaI Improvements in Ext1"acting. Steam'from Turbines for Industrial Purposegof which the following is a specification.- y

This inventionfrelates to steam turbines from whicha certain amount of steam is valve, or a. number of separate-valves, must be provided to close ofi nozzles leadi l dnfifmm an intermediate stage for heating or other industrial purposes. In order to maintain-"the'pressure in the stage from which the Steam: is'extracted, some form of to the next lower stage. But. when a tur me is thusv arranged, certain precautions must beftaken to prevent the occurrence of'da "gerous conditions; during operation. T e three principal'things to be guarded against are, first, the running away of the turbine by a back flow of low-pressure steam from the heatingpipe, should the load be re- 1r oved; second,- the occurrence of excessive pressure jdi'flerencesfon opposite sides of the diaphragm carrying the stageevalves above 3o mentioned fend, third, variation of the pressure in the heatingline beyond proper limits, "o'win'gfto the quantity of steam availableQ 7 1 The resent invention aims to provide mechanism which" will automatically care for these possibilities of trouble by means of a valve inserted in tneheater pipe and serving both as a pressure regulator and as a hu? ofi valve, as the occasion may arise.

h( invention will be better understood fr. .n the following detailed description, taken in connection with the accompanying drawings, in which-- Figure 1 is a side elevation of a portion of stages with two bucket-wheels 1 per stage.

Diaphragms 2 separate the stages, and the nozzles 3 in the-diaphragm 2 between the second and third stages are controlled by hand-valves 4, sothat one or more of said ,nx'rnac'rme s'rm FnoM- -'1 URBI-NES FOB. nmus'rnmr. mmrosss.

. Snecifieation 0! Letters Patent. Patented Jan. 27, 191 1.- Application filed Au ust 7. 1912. Serial No. 713,701.

nozzles can be closed to maintain the proper pressure in subsequent stages. A heater pipe 5 leads of! from the casing 76 of-the turbine between the second and thirdstages The flow, of low-pressure steam through said pipe is controlled by a combined throtg tle and shut-ofl valve 7, preferably of the balanced type. The stem of said valvec arries a dashpot 8 to dampen the movement of the valve when it closes automatically. Said stem also has a lug 9 which is normally engaged-by a spring catch 10 pivoted on a block 11 carried by the rod 12 of a hydraulic or other motor 13. -The pilot valve of this motor is arranged in a chest- 14 and its stem 15 is pivoted to a floating lever 16, one end of which fulcrums on' the rod 12 of the motor, while its otherend is connected by the link 17. to a level-F18 arranged to be actuated by a diaphragm or other movable abutment inclos'ed in a casing 19 and exposed on one side to thepi'essure of the steam in the heaterpipe-after it passesthe valve 7. This pressurezacting upon said abutment causes the motor 13-to regulate the position of-the valve in such a;

manner as to maintain an approximately: P

uniform pressure in the heating system; In order to enable this valve to operate as a shut-oil in case of no load, therevis anand can trip the catch at any point inits travel. The bar isv connected by a rod .22 with an emergency governor 23 on'the turbine shaft, so that if the turbine attempts to' run away by reason of a'backward flow of low-pressure steam from the heating system, the catch 10 will be promptly tripped and the valve 7 will be closed by its own weight assisted by a spring 24 shown in dotted lines. i

moves In the modification shown in F igs. 2, 3

and 4, the motor 13 is dispensed with, and the stem of the valve 7 is operated directly -by the diaphragm 25 in the casing 26 which is open to the heating pipe. The stem 27'of the valve 7 is tubular .and is sleeved upon the rod 28 which connects the diaphragm with the counterbalanced lever 29. A spring 30 thrusts down the valve stem when the spring catch 10 is tripped; said spring being I 'desire to have it understood that the apparatus shown is only illustrative, and that housed in an inverted cup 31' secured to the the invention can be carriedout by other means.

: What I claim as new and desire to secure by-Letters Patent of the United States, is:

I 1, The combination with a steam turbine,

of a pipe for conveying away steam for heating or other industrial purposes, a valve controlling said pipe, means for automatically ,regu'lating said valve to maintaina uniform pressure in the heating system, and means for automatically closing said valve in case the machine exceeds its normal speed.

' 2. The combination with a. steam turbine,

- of. a pipe for carrying away steam for .heat- .ing or other industrial purposes, a Qvalve controlling said pipe, a rod'for actuating said valve, a spring catch connecting saidrod and valve, a movable abutment exposed to the pressure of the steam after it passes sa.id valve, 'means whereby said abutment regulates the position of said valve, and

' fln'eans fontripping, said catch in case the machine exceeds its normal speed.

3. The'combination with a steam. turbine,

of pipe for conveying away steam for heating or other industrial purposes, a valve controlling said pipe, a rod for actuating said valve, a spring catch connecting said 'matically operating said Valve and a means f r rqg latt valve to maintain a llnlfor Press.

governor and means whereby said emergency governor can actuate said bar. to trip aid catch andpermit said valve to close.

4. The combination with a steam turbine, f a pipe for carrying away steam therefrom for heating or other industrial purposes, a valve controlling said pipe means for autothe-pres'sure on the steam in'the heating system, and means for automatically shutting off said pipe from the turbine in case the turbine exceeds its normal. speed.

5. The combination withg. multistage tur-' bine, of a pipe for carrying away'steam from one of its stages for industrial purposes, an automatic, pressure regulating valve for said pipe, a bypass from said stage to the next and means for opening said bypassat a pre determined steam ressure. 6. The combination with a multistage turb ue, of a p pe for conveying away steam from one of its stages for industrial purposes, an automatic pressure regulating valve for said pipe, a bypass from said stage to the next, and a weighted valve for open ing said bypass at a predetermined steam pressure.

' 7. The combination with a multistage turbine, of apipe for conveying away poses, hand valves controlling the flow of steam from said stage to the nozzles of the next stage, a bypass between said two stages, and a weighted valve foropemng-said bypass at a predetermined steam pressure.

In witness whereof, I have hereunto' 'set..

my hand this 5th-day of August, 1912.

- EDGAR D. DICKINSON.

j Witnesses:

BENJAMIN B. HULL, 7 HELEN Onroxn.

i thfiligating y m, a baradiacent'to said catch ng a parallel ruler motion, an emergency .lve to regulate steam from one of its stagesfor industrial-pur- 

